Mounting of speed cup and rotor shaft



Oct. 6, 1931. ZUBATY 1,826,409

MOUNTING OE SPEED CUP AND ROTOR SHAFT Filed March 11, 1926 Otherobjects will Patented Oct. 6, 1931 1 l vThis invention relates to measuring instru- 'ments. It is particularly concerned withan smzs PATENT F E Josnrn' ZUBATY, or FLINT, MICHIGAN," AISSIGNOR TO A OSPARK' PLUG FLINT, MICHIGAN, A COMPANY or MIoHIGANU COMPANY, OF

; igtoun'r ne or SPEED our are noron' snarr I ,fiap nation filed March 11, 1926. Serial u 94,096.

" improved speedometer, but its novel construc- '-aS 'Welli tion will be found useful in other'instruments "Among the objects brine invention are an improvement in the'mounting of the magnet for a magneticspeedometer, an improvement in the mountingof a rotor shaft, and an im-,

provement in the, speed cup mounting.

appear as the full description proceeds. I i

In the drawings a Figure 1 is'a toprplan view of the frame and parts of the speedometer, the casing hav ing been removed. Figure-2iis a vertical section on line 22 of Figure 1. Figure 3 is a rear elevationof the lower part of the instrument. Figure 4 is a section on line 44 of Figure 3. Figure 5 is a detail showing in section the lower bearing of -a speed cup spindle. V

Referring by reference characters to the drawings, numeral l rep'resents a frame mem ber carrylngthe speedometer and odometer parts. This frame is a die casting and is of a somewhat box shape. At the right of F igure 2 will be seen the annular resilientplate .3

which is fastenedto the frame and which furnishes the sole connection between the in- 'strument and its casing. It isintended that this resilient plate 3 shall take the shocks and jars from the vehicle instrument board and absorb them before they are transmitted to the delicate parts of the instrument.

The magnet 5 is of a well known U shape.

'It engages the frame at three points. The

. trally secured to the frame by machine screw f lower point of contact with the frame isshown in Figure 2 at 7 and the two upper points at 9 as in Figures 1 and 4:. For securing this magnet to the frame a relativelylong channel bar 11 is used. This bar 11 is cen- 13. .One of the walls of the channel bar near the angularity of the magnet. It will be seen also fromFigure 1 by the dotted lines that the channel member overhangs the outer sides of the magnet.

rotor or first worm shaft with .the rotoris pushed down through the "vertical passage:

andfreleasing the shaft-1 7, an'oiling wick may-be placed in the spaceunder the screw .13 tolubricateshaft 17. y

the rotor the shaft is form'edwith a worm '21. This-worm 21 engages the worm .gear

'22 on the so-cal-led second-wormshaft. all] Will be seen that in assembling the parts, the

'Wa'y inthe frame and brought into geared engagement with Y the second worm shaft. For the: purpose of holding the'shaft 17in position use is madeof a clip 23. This clip is ofU shape, its upper arm engaging a shoul- I :der 26 on the shaft 17 and its-lower arm engaging the frame me'mberLj To prevent this clip slipping off the'frameand releasing its holdon shaft 17, the magnet holding bar 11 is made'use of. I From Figure 2 it will be seen that the central portion of this magnet holding bar projectsupwards sufliciently to prevent the clip23 fromslipping'off the frame The speed'indicatingmemberof the speedometer, or the speed cup; so-called, is mountedvby means of clamps25 on the sprindle 27.

Differing from the common construction of mountingLthe lowerwspindle bearing-in a frame member, I prefer to utilize the-rotor 'shaft'l'lforcarrying the lower bearing. It 'Willbe -SGGIPfI'OmIFlgUI'G 2 and better still from Figure i51that'the upper endof the rotorshaft .17 is provided with a shouldered recess 29. 4 Into this recess is inserted a-jewel carrier 31. :In the-bottom ofthejewel car rier is ajewel 33, the. upper surface of which is finishedto furnish a bearing for the'end of the spindle 27. The metal of the cup is crimped under the jewel as at 35 to hold the jewel in position. I Above therjewel 33 and engaging ashoulder ingthe cup 311s a hole jewe1.37 Forthepurpose of holding this holewjewel in positiongthe metal may be shaved intolyengagement therewith- .Over the speedcupj and. secured to the upper portion of, the frame, is a somewhatU shaped I plate 39; serews 4l1loeing shown 'to secure the .plate'to the frame. "The plate is provid'ed in this'o'pening is inserted a shouldered jewel Y carrier 43. Mo-untedin the jewel carrier v43 is a hole eWelQj-the metal-of the carrier;

. being shaved down to hold the jewel in posi 'tion as before. Surrounding the" circular np ere ortienfef the Carrier," whi'eh it with lcatin'g meiiiber a frame-' member remover,-

be observed lies aboveitheplaite139g is the ap t d p p v t PQUi I iQiE- level-4t 7 the fixed U-shape'd magnet is clamped to the opposite side. 1 [I claim: j 1. In'a magnetic measuring instrument, a 'frame a rotor shaft therein, a magnet, holding means'therefor a clip for retaining the rotor shaft'gthe magnet holderlpositioned to prevent the escape of the retaining clip." 2Q A measuring instrument, a rotary indiilitheirame member-filiaving a jewel carrier 1, mounted therein forthe' spindle: of the indi catingmember 'thecarrier extending slightly point convenient for'operation. ltextendslaloove. the frame, a hair spring adjusting to the rear and has a downward extremity spring 5 3,-; the; other end of the Qh'air spring i b ng; b n c fiethep nd e2h u l;

Meansisproyided to limitthe rotation-10f thepeedeup asinfluenced by the hair spring at. a point; where-Ethejzero readingshall be wer -P t e+=F r hi i' p ew i fi 'gle 16W! .5 i piye ed ,n a-ri h front of 1 f; ,w tlreplate 393. 7' 'llhe lower portion oftheangle Y member "55,, projects downwardly. where iten ,geges a. lug 57 prejectjng upwardlyifrlem the i mpg-The purpose oi the pivotal eon-1 v neetfioni of lever 5,5,is top'rovi'de a..,@o1tlt6 i0 ifoeslightlinaecuraeies in manufacture and assembly. fis ond lugifiilis also" provided on the-espeedpeup to limit, the rotation of the .i speed cuptoisomewhatlessthan,threehun ,Ij' dredsixty degrees; (360); The purposeof n this second liugviseto previentithe reading of the indicator; returning to, zero: after ithe .SPQQdfbf thepuehieleiexceeds.themaximum readingain'miles or kilometers per hour a s- V indieatedjbythe speed cupid. .5; j 7' 3 Fon-r et'aiining thespindleQZ from axial l 1 movement and for'holdiiigthe spring adjust 1 z H Zing-level tlfirmly. against the plate'39 Ipre- 1 i A fer-to use a U shaped resilient; member 61.

' lever' ournalled about the projection of the Je l ar ie -s ap d resilie tmemb one arm ret i g the p n l r m-axia I-m ment n t el herm g' he lever to; hold it in: adjustedgposition; y

JOSEPH ZUBAIY:

-flne arm of. thisiushapedmemberliesqafew 'thousandths ofan inch abe /,6 the ends-f the si indileaee iThe ethelj'ai' Of theU Shape I a '3 memher'iseforkedland engages'lever fiiad- 5 jaeent its:-pi vot; iAscrew 6'3 passes through the upper arm of thej U; shapedmember-and i I is extended into the jrame member. iBy i j: means of this screw the tensienioji;the I sl'iapedjspring'upontheileyeriis-madeVariet i; ableas; also is the clearanoe at therupperwend 4; i;

' The odometer mechanism tpalitrdf this invention. It: includes vehicle .z '.wheels,gone of which :is-dgesignatedby nu- 1 I of thespindlefl; V

meral 6.0; Thesewheelsmay be'dr iven by anyelsuitabl edriving *me ans'fnotf shown) I 'fromr-shafti22-fyThe'shafts for't'he odometer .7 wheels. as atv 62jwillbemountedin'the end walls- 0f theframe in theusual-way Itwil l i 7 therefore beseen that th e; odometer inechaaimism may beconveniently arranged-onone side-ef the intermediate'partof the'die-east I 1 I I V it I f iframe which carries rotor; shaft Hand In testimony whereof I aflix my ,signatur e.-. 

